layout.css

body{
    margin:0;
    font-family: Arial, Helvetica, sans-serif;
}

#header{
    background-color: lavender;
    height: 150px;
    padding: 5px;
}

#menu{
    background-color: mediumaquamarine;
    height: 30px;
    padding: 5px;
}

#sidebar{
    width: 300px;
    height: 400px;
    padding: 5px;
    float: left;
    background-color: gray;
}

#konten{
    float: left;
    padding: 5px;
}

#footer{
    height: 30px;
    padding: 9px;
    background-color: firebrick;
    clear: both;

}